https://creativecommons.org/publicdomain/zero/1.0/https://www.rawpixel.com/image/14014947Edit ImageSaveSaveEditCropCustom TextRoyal Institution, Manchester, England. Line engraving by A. Ashley after J.F. Burrell.Original public domain image from Wellcome CollectionMorePublic DomainFree CC0 image for Personal and Business useInfoView CC0 LicenseJPEGSmall JPEG 1200 x 886 px | 300 dpiLarge JPEG 3168 x 2340 px | 300 dpiFree DownloadRoyal Institution, Manchester, England. Line engraving by A. Ashley after J.F. Burrell.More